一、优化的配置文件
[client]
port=3306
socket=/tmp/mysql.sock
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
user = mysql
basedir = /app/mysql
datadir = /app/mysql/data
port=3307
server-id = 1
socket=/tmp/mysql.sock
#允许创建函数
log_bin_trust_function_creators = 1
character-set-server = utf8
#log-error = /var/log/mysql/error.log
#pid-file = /var/log/mysql/mysql.pid
general_log = 1
skip-name-resolve
#skip-networking
back_log = 300
max_connections = 1000
max_connect_errors = 6000
open_files_limit = 65535
table_open_cache = 4096
max_allowed_packet = 100M
binlog_cache_size = 10M
max_heap_table_size = 32M
tmp_table_size = 64M
read_buffer_size = 8M
read_rnd_buffer_size = 8M
sort_buffer_size = 8M
join_buffer_size = 128M
key_buffer_size = 8M
thread_cache_size = 64
query_cache_type = 1
query_cache_size = 128M
query_cache_limit = 2M
ft_min_word_len = 4
log_bin = mysql-bin
binlog_format = mixed
expire_logs_days = 30
performance_schema = 0
explicit_defaults_for_timestamp
lower_case_table_names = 1
myisam_sort_buffer_size = 8M
myisam_repair_threads = 1
interactive_timeout = 28800
wait_timeout = 28800
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER,STRICT_TRANS_TABLES
[mysqldump]
quick
max_allowed_packet = 16M
二、参数解释查看
max_connections = 1000 #客户端连接数
max_connect_errors = 6000 #错误连接数
-----
mysql> show variables like '%conn%';
+-----------------------------------------------+-----------------+
| Variable_name | Value |
+-----------------------------------------------+-----------------+
| character_set_connection | utf8 |
| collation_connection | utf8_general_ci |
| connect_timeout | 10 |
| disconnect_on_expired_password | ON |
| init_connect | |
| max_connect_errors | 6000 |
| max_connections | 1000 |
| max_user_connections | 0 |
| performance_schema_session_connect_attrs_size | 0 |
+-----------------------------------------------+-----------------+
9 rows in set (0.01 sec)